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During the Pliocene to middle Pleistocene, pluvial lakes in the western Great Basin repeatedly rose to levels much higher than those of the well-documented late Pleistocene pluvial lakes, and some presently isolated basins were connected. Sedimentologic, geomorphic, and chronologic evidence at sites shown on the map indicates that Lakes Lahontan and Columbus-Rennie were as much as 70 m higher in the early-middle Pleistocene than during their late Pleistocene high stands. Lake Lahontan at its 1400-m shoreline level would submerge present-day Reno, Carson City, and Battle Mountain, and would flood other now-dry basins. To the east, Lakes Jonathan (new name), Diamond, Newark, and Hubbs also reached high stands during...
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This publication updates previous fault maps of Oregon as a contribution to the larger U.S. Geological Survey effort to produce digital maps of active faults in the Pacific Northwest region. The new map is derived from the 1992 fault map of Pezzopane, Nakata, and Weldon that has seen wide distribution and has been reproduced in essentially all subsequent compilations of active faults of Oregon. This publication provides a substantial update of known active or suspected active faults east of the Cascades. Improvements in the new map include (1) many newly recognized active faults, (2) a linked ArcInfo map and reference database, (3) more precise locations for previously recognized faults on shaded relief quadrangles...
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This publication updates previous fault maps of Oregon as acontribution to the larger U.S. Geological Survey effort to producedigital maps of active faults in the Pacific Northwest region. The newmap is derived from the 1992 fault map of Pezzopane, Nakata, and Weldonthat has seen wide distribution and has been reproduced in essentiallyall subsequent compilations of active faults of Oregon. Thispublication provides a substantial update of known active or suspectedactive faults east of the Cascades. Improvements in the new mapinclude (1) many newly recognized active faults, (2) a linked ArcInfomap and reference database, (3) more precise locations for previouslyrecognized faults on shaded relief quadrangles generated...


    map background search result map search result map An update of Quaternary faults of central and eastern Oregon Extent of Pleistocene Lakes in the Western Great Basin An update of Quaternary faults of central and eastern Oregon An update of Quaternary faults of central and eastern Oregon An update of Quaternary faults of central and eastern Oregon Extent of Pleistocene Lakes in the Western Great Basin